Interface Map.Entry<K,​V>

A map entry (key-value pair). The Map.entrySet method returns
a collection-view of the map, whose elements are of this class. The
only way to obtain a reference to a map entry is from the
iterator of this collection-view. These Map.Entry objects are
valid only for the duration of the iteration; more formally,
the behavior of a map entry is undefined if the backing map has been
modified after the entry was returned by the iterator, except through
the setValue operation on the map entry.

setValue

Replaces the value corresponding to this entry with the specified
value (optional operation). (Writes through to the map.) The
behavior of this call is undefined if the mapping has already been
removed from the map (by the iterator's remove operation).

equals

Compares the specified object with this entry for equality.
Returns true if the given object is also a map entry and
the two entries represent the same mapping. More formally, two
entries e1 and e2 represent the same mapping
if